[apta]

Quite scary to run financial transactions using an untyped format.

[djbebs]

You'd be surprised just what kind of stuff goes through JSON to be parsed by unreliable Javascript engines 9ver software that doesn't correctly implement the JSON standard

>.<

[zo1]

Everything is JSON these days, unfortunately.

[novok]

You can apply schemas and force integers although. You also have typed serialization formats such as protobuf.